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Re: Default shared memory SGML mention

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: PostgreSQL-documentation <pgsql-docs(at)postgresql(dot)org>
Subject: Re: Default shared memory SGML mention
Date: 2001-05-08 20:06:25
Message-ID: 200105082006.f48K6Qw27411@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-docs
> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> >> A little experimentation shows that the present multiplier for -B is
> >> about 8350 bytes and the multiplier for -N about 14580 bytes on my
> >> system (HPUX), which extrapolates to a fixed base of about 250K plus
> >> the -B and -N contributions.  In reality I believe the computation
> >> is somewhat nonlinear, but that's probably close enough for starters.
> 
> > I have updated the SGML sources to say for default shared memory values:
> 
> > 	250 kB + 8192 * buffers or infinity
> 
> How did infinity get into this?  And what happened to the -N
> contribution?

Infinity was always there.  The column is labeled "Typical Values".  As
far as -N, buffers is always 2*N, right, so I figured it was in there
already.


-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman(at)candle(dot)pha(dot)pa(dot)us               |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
  +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026

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